Fast 3-D Geo-Electromagnetic Inversion Based on Quasi-LinearApproximation

小行星9614136 地球电磁探测是探测地下构造的主要手段之一，其技术被用于绘制从地壳到地幔的地球图。 应用包括地质测绘、矿物和石油勘探、构造和地震研究以及环境评估和监测。 电磁地球物理方法的最困难的问题之一是在具有三维地电结构的区域中的电磁数据的解释，这是由于三维正演模拟代码的限制和反演过程的不适定性。 目前可用的EM技术只能处理简单的模型，需要超级计算机处理。 PI建议开发快速和稳定的三维地质电磁反演方法，可以应用于真实的地球物理数据，使用传统的PC或工作站，使用新的方法，基于现有的积分方程算法的准线性近似。 ***

9614136 Zhdanov Electromagnetic (EM) probing of the earth is one of the major tools for surveying underground structures and the technique is used to map the earth from the crust to the mantle. Applications include geological mapping, mineral and oil prospecting, tectonic and earthquake studies, and environmental assessment and monitoring. One of the most difficult problems of EM geophysical methods is the interpretation of EM data in areas with 3-D geo-electrical structures because of limitations of 3D forward modeling codes and ill-posedness of inversion procedures. Currently available EM techniques can handle only simple models and require supercomputer processing. The PI proposes to develop fast and stable 3-D geo-EM inversion methods that can be applied to real geophysical data using conventional PCs or Workstations using new methods based on quasi-linear approximations of the existing integral equation algorithms. ***